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Home My WebLink AboutGrading Plans - 02/08/20241 \�lr i� �/ l' \_ .. � _ k � - 1' ; _—/ ; � � ��,�� I - ^ � iir � ��,'�C � January 16, 2024 Water Utilities Engineering City of Fort Collins 700 Wood Street Fort Collins, Colorado 80522 RE: 330 East Myrtle Street Drainage Memo Parce19713207012 To Whom it May Concern: KEEFE CNIL,INC 3125 Crockett Street Fort Collins, Colarado 80526 (970) 215-6808 meg@keefecivil.com Keefe Civil Project Number: 2024-001 Grading/Stormwater Plan Accepted (Building Permit Released) Accepted by: Dan Mogen Date: 02/08/2024 B2400375 E 1/2 OF LOT 9, BLOCK 145, FTC The purpose of this letter is to describe the proposed site improvements and potential drainage impacts at 330 East Myrtle Street (Exhibit A). The 0.22-acre project site is a developed single- family residential lot with an existing garage off the adjacent paved alley. The site is located on the north side of East Myrtle Street between Peterson Street and Mathews Street in Fort Collins, Colorado (Figure 1). ._.�.:..,,...�.�-� J:-�,� i_, r g�r. a«�.,, ec i� - � �� Vicinity Map�� '•.t. i �.� �i ��` �� "�� c ' � '�ua �:� , r � � �° ''�'l�wyk '�.. � � .�`-�� . � �� '�.: V.,�� ,; i� � � � ~� � a � ' , « .'�"-' � � � 5 ��- ;`�; r. � +i.c�a. r�,�` • . �,f.' �%�:- - -�' __� .i.;, £��r� �--+�L,� v 'i1 ��rr �--4L.�a � �� ti't:_ ' �� . .s i?w ��"'- _ . _..t„K.,, i� � t rt� �� ,& A r. �✓�.. � �� k�.. � �'' . ?- 'r :. � , y +� , � ,� �I Ta � �'��is=: �� _ � �.� �� _ s..�� ,," �� ,�� <r � � __ F� � � i �h , �� - , � ,�` ^ � 1 � ., i � -.r��` n . a � t 1` y' �� ' j �::� .. _. ��:. i�, � �f�� ' � � �''� "� :,. ��, �; _� ; r � o- ."4r �_ �' � ` i �j,.-:_� ' � �� -�e'� '� ,�IF� �.' �'.. ��'Y a -�� . '�i �' �. . 7 �ear`�4. `'�, � �i," '�`p��;� , � �' �' � � "� � ., ,'�� ,. � _� � '�1��`. , � . �, _'� �,. � E4 F� ' � �� ` T' �� "� �� I r �-'�� , � '�= ` � � � �. . ,� � � � _ a4 .,. �� ",- �� 4�, -.. r��. � ; �,c� � ; � ', -y, ��,�� , F Site ;' r� �y�,�, '.'� �;. �, � ' ?e , i r _ . �� t.'�-�,C„� � `'j �� A, a,;� �. T�y-- �r gt x T �_ � t ` ;.�jb� 1' �� .oa;�. � ��`�` J � � .pY-.,4 J �"�'�� . � ! ; 1 �-n"� � -� �r�-. .ta��` ..',�. .. l , � ' � "T'�"� "+' " -.-. j' .... -.� , �, . I. . , � o•.X.. - - � k �i��` ' �': �`� �`�'"r� � _ �=i� y _ �, � Fx m 'y" �� 4',,+c'��- 4 1�� 1 � �`- ��'� "� � � � `�. :� �"T ��•: �� T�� i �� `F ��_ � �� Y ., � �� t I� �1: ;�`—�-.Yrt�" _ '�r �r, �. �� , ',i „^'r-. � F, ; ':�`� �..,1 i. L . . ..�' ..'i'r- T��.:�...d� , ��; '� ��: ��-� r _ '�:-'��_ ��M� `�_.�'� � g:i�: ��.; Figure l: Vicinity Map Q� O� O D� O ap O O� O O Op o� O� O� Op O� V� O� D D� �� O� O� Op O� � ' d d d d d d d d d d d d d d d e a d d d d d d d d � G a a a a Q G Q G a a Q Q G G Q G G Q a a Q Q G Q eo eo eo eo 00 00 0o eo ao 0o ea ep eo eo eb eo ep eo eo eo ap eo 00 op eo � �A�A�AAG�AAAAAAG�A.A�AC•��AG�AAA 330 East Myrtle Street Drainage Me�no Pa�e 2 of 3 Keefe Civil Project No.: 2024-001 January 16, 2024 The lot is bound by existing single-family residential properties on the east and west lot lines, East Myrtle Street right-of-way to the south, and a paved alley way to the north. Historically, site stormwater in the backyard has drained with gentle slopes from the north to the south, into East Myrtle Street right-of-way. The site is located within the Old Town drainage basin. Per the NRCS Soil Survey of Larimer County (Exhibit B), the site entirely consists of Fort Collins loam and is classified as being within hydrologic soil group C. These soils are anticipated to have a slow infiltration rate when thoroughly wet and a slow rate of water transmission. Per the flood insurance rate map 08069C0979H (effective OS/02/2012), the lot is located within Zone X. Zone X is defined as an area of minimal flood hazard and does not have a base flood elevation associated with it. The southern portion of the site (outside the limits of the proposed improvements) is within moderate flood risk per City of Fort Collins mapped floodplains. (Exhibit C) The proposed site improvements include a new garage off the paved alley to the north, and a concrete driveway apron. Based on field survey by others shown in the attached overall grading plan (Exhibit A, sheet 1 of 2), the alley drains east towards Peterson Street right-of-way without negatively impacting adjacent private property. The site's grading plan alters historic drainage patterns slightly (Exhibit D). With the proposed garage, 750 square feet (s fl of new impervious area will be directed towards the alley. Where possible, impervious areas and downspouts shall be routed into pervious areas with landscaping to allow for project stormwater infiltration and increased water quality with site runoff; however, the garage roof was designed to slant entirely towards the alley. One of the downspouts is proposed to be directed west prior to flowing into the alley. The eastern downspout direction is limited to drain north due to the proximity of the property line. Historic Developed Site Area Site Area Overall Site Hardsca e or Hard Surface s s Concrete (100%) 330 290 Rooftop (100%) 2,865 3,240 Total Impervious Area 3,195 3,530 Adjusted Site I�mperviousness 335 Area Draining to Alley 0 750 New Area Draining to Alle 750 Since the lot's total adjusted impervious area increase is below 5,000 square feet (s�, water quantity detention requirements are not required for this development. Based on the enclosed design, it is iny professional opinion that the additional runoff generated by these site improvements will not cause adverse impacts to downstream private properties. I hereby attest that this letter for the final drainage design for 330 East Mrytle Street was prepared by me or under my direct supervision, in accordance with the provisions of the Fort tic v +r� � ir ra �r � r �r r sP rrr v � �r � �r +a �r r �r � �n ��tr r � a a a e a e e a a a e a e e e e a e a a e e a e e � a v a a a a v a v a a a v a a a a a v a a a a v a eo op ao op ep ao 0o e� e� o0 od eo e� ep ee ep ee oo ep ap eo e� e� eo e� � �ALJ4L.��'�AAC�LJAG�C�CJLJ`J4AA4AAACJdl� 330 East Myrtle Street Drainage Me�no Pa�e 3 of 3 Keefe Civil Project No.: 2024-001 January 16, 2024 Collins Stormwater Criteria Manual. I understand that the City of Fort Collins does not and will. not assume liability for drainage facilities designed by others. Thank you for the opportunity to submit this drainage memo. Please do not hesitate to reach out to me if you have any questions or comments regarding the above items. Best regards, Megan L. Keefe, PE / Manager Keefe Civil, Ine. � D�P D 0 LICFiIr O�.•��N�L ��t':`rF0 . � cc . �,��' O1/16/24�m: 's 39378 i �� Oiglfillysignedby � � Me9an L K�ee�x � � R�eason. I uesllo I'� � � V� G -��'��tlau��,\� � csS��NAL E�� Enclosures Cc: John Davison, BLM Construction �' d r' �r � is �r ir rr � 1ri ir v' r � tir � �r � ir r y' �r oo Vr r � a a a e a e e a a a e a e e e e a e a a e e a e e � a v a a a a v a v a a a v a a a a a v a a a a v a eo op ao op ep ao 0o e� e� o0 od eo e� ep ee ep ee oo ep ap eo e� e� eo e� � �ALJ4L.��'�AAC�LJAG�C�CJLJ`J4AA4AAACJdl� II � � � � � �� -� �� i � .�: I � I� __ � � � EXISTING RESIDENTIAL LOT D �' � � �- — —� � — �, �� ' � � '� U� � � �'I I � � , � ,- � � ' �„� ,�� I � � � � �_ 190.10' �r — _ � ,�° ; � — _;� ��so°oo�i2 w — ,� ,: — - —, - -- ;�;-- _�--, .�� — i"' -rr^: �� II — — — �� — �_ -- FO _ �, -�-- II ��-: � I I PROPERTY LINE ��. � �� E—�- -� _ �`' �--� II � � o I � Q -- � � I =��''� m �. II �, � M -�Do� ,� � �I r� � I I I , L tn N — — ^� — � ' � � � —I � �,. C � � T — � W�� . � l(pf� _, ' c.� . , , � � � Z a ° �_ G L. i � d" c.L-._ — �`, �� .. �r�� —,`� - � , � _ � � � � I � � s� — PROPOSED �, � I I— � I , . , � O O _� — , ,,_ �; -- �.,-- �--- _ —_ 'V GARAGE �� W� T T � I I � � ' � � � � -- - , � �� , � � � � = i � � ��. �, I � I � — — — — — — — — — — — ~I1ll • ' � NO°02'28"E � �I, � o , � — . . , a �� - — ,�� ,� � Q ' e� . � _ -_ _? �� -19�.�.�i� .. V � � '�- _ i� W�� a• „ ,� /\ �� L °I � , ,, ° � � C'� • EXISTING �' n ,�7 z O , p,� �� I I m � GARAGE �,,�. ��. ,, OO�C� ., �, I EXISTING RESIDENTIAL LOT � � FF=4990.24 i a O .. Q� Q' �� T� � A p i� . p I I I N I _ � � � I�I o � �I � �� I o N -�a in �,, ep, G (� ;. 'I I _' � � '� �a _�c�� ' I I� _ � —I `° y ° — II� j � � � �� ,�, �, � ._ LEGEND: —� a �♦ , , . , o' • , � a , � ; a '.� ' P ' . � < -- X X �X CONCENTRATED DRAINAGE FLOW DIRECTION OVERLAND DRAINAGE FLOW DIRECTION EXISTING/PROPOSED CONCRETE AS NOTED PROPOSED FLOWLINE PROPOSED RETAINING WALL EXISTING FENCE Fo Fo Fo — EX COMCAST FIBER OPTIC o�.0 OVERHEAD UTILITY LINE E SS SS SS UNDERGROUND POWER LINE EX SEWER SERVICE � I � �� \ � �99� I i � 5' 'FSETBACK I �\ � - I iii �` �, �O _ _ F� , o �,� �r�, � � ��. � � � � f f � � � � � �� r w J J Q � L1J i Q a � � � i � -° o � C `"-pz �� P � =7 ��i N C�; C� � ' � I � � ' � \ \ I � / I' �/ � � � — — —��u� �� ,_. � � � � �� - � � � � � � � � � �� , �� — �� , � � _;; PETERSON STREET I \ , SEE DETAILED SITE � GRADING PLAN SHEET 2 � � � � � / — / � .� � / i � '� j I �- � � � �I �� I'� / � r � � POUDRE FIRE AUTHORITY STATION 1 � c9 � O .� �if�`J � � �� _ � � N �� p,DO LICFiL �, ,..•....� s \_ .— V�.•'�PN � �c' ;�O F : ��' m : — i 39378 'r . . . . -O • •� �� '�F''••.....••',,'�G.��, sS�ONAL E�' U � Zw� � � � o� O U �O J > F U j U Yzow W U � � W W � O N � WNo�W Y �� . �, ■ ' '� � V �1 " 1� I� `1 �1 i _� _�;�� Z W Q W � a a (� (:3 °C W Z O 'J � U � � z G � J � J U W � O M> LL M � SHEET 1 OF 2 LEGEND: � �g�� . X(�gg� 9) X 2� � (1�) � a ., o . . , • a , � , a , � P , D� PROPOSED SPOT ELEVATION EXISTING SPOT ELEVATION PROPOSED SLOPE EXISTING SLOPE EXISTING/PROPOSED CONCRETE AS NOTED PROPOSED FLOWLINE PROPOSED RETAINING WALL PROPOSED DOWNSPOUT AND FLOW DIRECTION ABBREVIATION LEGEND: CONC CONCRETE DS DOWNSPOUT DWG DRAWING EG EXISTING GROUND EOG EDGE OF GRAVEL EX EXISTING FF FINISHED FLOOR FG FINISHED GRADE FL FLOWLINE FS FINISHED SURFACE (CONCRETE) GB GRADE BREAK GFF GARAGE FINISHED FLOOR HP HIGH POINT LP LOW POINT ROW RIGHT-OF-WAY —FO— -oH�� E — —ss— EX COMCAST FIBER OPTIC OVERHEAD UTILITY LINE UNDERGROUND POWER LINE EX SEWER SERVICE FENCE LINE Developed Overall Site Hardscape or Historic Site Site Area Hard Surface Area (sf) (sf) Concrete(100%) 330 290 Rooftop (100%) 2,865 3,240 Total Impervious Area 3,195 3,530 Adjusted Site Imperviousness 335 Area Draining to Alley 0 750 New Area Draining to Alley 750 CITY BENCHMARK: 29-97 NORTHEAST CORNER OF MULBERRY ST. AND WHEDBEE ST., ON A CONCRETE TRAFFIC SIGNAL BASE. NAVD88 ELEVATION = 4978.01 SITE BENCHMARK: NORTHEAST PROPERTY CORNER FOR LOT 10. NAVD88 ELEVATION = 4889.15 SURVEY NOTES: 1. THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE APPROXIMATE WHEN SHOWN ON THESE DRAWINGS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY THE EXISTENCE OF ALL UNDERGROUND UTILITIES IN THE AREA OF THE WORK BEFORE COMMENCING NEW CONSTRUCTION. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL UNDERGROUND UTILITIES AND SHALL BE RESPONSIBLE FOR ALL UNKNOWN UNDERGROUND UTILITIES. 2. ALL PROJECT CONTROL LISTED HEREON IS PROVIDED AS A COURTESY. IT IS THE RESPONSIBILITY OF THE RECIPIENT TO VERIFY THE ACCURACY OF THE COORDINATES AND ELEVATIONS SHOWN PRIOR TO USING THEM FOR ANY PURPOSES. 3. ANY LOT LINES, RIGHTS OF WAY OR EASEMENTS SHOWN ARE APPROXIMATE AND ARE NOT TO BE RELIED UPON FOR FUTURE IMPROVEMENTS. GRADING NOTES: 1. TOP OF FOUNDATION MUST BE AT LEAST 6" ABOVE THE HIGHEST GRADE SURROUNDING ALL BUILDINGS. 2. THERE MUST BE A MINIMUM GRADE OF 5� AWAY FROM THE BUILDINGS WITHIN THE FIRST 5 TO 10 FEET ADJACENT TO THE FOUNDATION. 3. SLOPES MUST NOT TO BE STEEPER THAN 33% (3:1). 0 � � , - �a / � � \ � -�--- �g9� �� - � ,�a-,� - � a. _ �° ' � Qy 4 I _' �. _ .. _ � � 14' � ; _ � ��,,� ��g8g �� o ;\/,; I ' � 7% ;% <, � i ._ � II I �u 5i I C�9a9 i I , �I _ ii �� O fV � I T T I rn o '' w To � � I i � �g8g'Z� � -i � ' ; ��;v� � � � � 0 J J Q H z w 0 � w � (� z � � X w � I,I _ � PROPERTY LINE PAVED ALLEY , I � EXISTING CONCRETE TO BE REMOVED � �� , 30' CONC DRIVEWAY� i i� i - — '_ - - - � 50.08' — — o— � � � •a , ' J ,. , � � � • , .�, a � ' „D�S�. "' � y � 'f� 4' f"� � I � ' � — J I 4 a � _ •�� —� �, a _ 1 FO �,_ RELOCATE EXISTING UTILITIES AS NECESSARY WITH CONSTRUCTION PROPOSED GARAGE TOF=4991.20 4990.7 FG 4990— �9a9 6� c 4990.7 � FG i I � ;�; � i.�� W Z �I!; �-Oy� i ~ I I I � W ��, \� � � � � I , a o �, "' j �. � ''; I I I 10 0' 5 10 20 1 " = 10' �0 4989.6 �FI (4989. 6) _� � >J d a a a� � ' � ,¢ , J Q c' � O p� Ul W =— W � �' i � � � 0 � Z�� Q�w�� Z � � � ��m�� O 6 , W wwWo ��z= �14% . � �.-.�~z cn = Z w o��=� �.. z=W�Q _ gNowQ 'llo. �'v� o � 3' 17% 4990. U � Zw� � �� o U �O J > F U j U YZOLL U � � W LL��Y W �� WNo�W Y �� . �, ■ ' '� � V �1 '� I / 4990.5� � � I F� � �\ � � � z Q z * (4989. 6) -' _` � I � EXISTING � w � � 00 � � W RESIDENTIAL o�� N�o LOT UU� O� O � W w� Z m ozZ_ �`' � Z ``oo `°~ � w �� s a � � J I �` a 0 c� w � O'ZQ JW r � �oc�n Q — — (%� Z � v � J ¢ Q(4989.4� I J Q U � * I x � � Z I I EXISTING � Q J I RESID�ETTIAL � W U � " i. I a a � � W O o��p,DO LI�F � M . . �s M 0 . . v�:�PN � �F•.�O . :�� m: : 39378 's . . . . -o• •!�� / SHEET � O�FSS��NA�EN�\� Z OF Z � Hydrologic Soil Group—Larimer County Area, Colorado � � (330 East Myrtle Street) a 493828 493837 4938d6 493855 493864 493873 493882 40° 34' SO,� N � _ I. I I I _�`I 40� 34� 5�" N � � � I � - rn rn � —' � � � , y � it � � ^ __ - _ 4 i � � � � - � � �—� I �i . . � ' �� ti � • _ l � �. — � 1 � ' -� _ � � - ,� - , �� _ - � � � � ' � � � � 4� _ - � I � � � � � � yl `II � � � � � i � �� I . � � ' S _ a Q ' � Soi[ PN1p niay noti be, valfCl;.'�t ifiis scale. • _ � �_ , , _ � � 40° 34' 48" N ` I I I I 40° 34 48 N 493825 493837 493846 493855 4938fi1 493873 493882 3 3 a Map Scale: 1:360 if printed on A portrait (8.5" x 11") sheet. a N Meters ° 0 5 10 20 30 � n � Feet �� 0 15 30 60 90 N Map projection: Web Mer�tor Comer coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 USDA Natural Resources Web Soil Survey 1/16/2024 � Conservation Service National Cooperative Soil Survey Page 1 of 4 Hydrologic Soil Group—Larimer County Area, Colorado (330 East Myrtle Street) MAP LEGEND Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons � A o A�o 0 B � B/D 0 C � C/D � D � Not rated or not available Soil Rating Lines �,• A �-.. � A/D r� B � B/D r r C r :* C/D ;�;�� D r r Not rated or not available Soil Rating Points o A 0 A/D e B � B�o 0 C 0 C/D 0 D 0 Not rated or not available Water Features Streams and Canals Transportation � Rails � Interstate Highways US Routes Major Roads Local Roads Background �i Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:24, 000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Larimer County Area, Colorado Survey Area Data: Version 18, Aug 24, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 2, 2021—Aug 25, 2021 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. USDA Natural Resources Web Soil Survey 1/16/2024 � Conservation Service National Cooperative Soil Survey Page 2 of 4 Hydrologic Soil Group—Larimer County Area, Colorado Hydrologic Soil Group 330 East Myrtle Street Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 35 Fort Collins loam, 0 to 3 C percent slopes 0.2 100.0% Totals for Area of Interest Description 0.2 Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition 100.0% USDA Natural Resources Web Soil Survey 1/16/2024 i Conservation Service National Cooperative Soil Survey Page 3 of 4 Hydrologic Soil Group—Larimer County Area, Colorado Aggregation is the process by which a set of component attribute values is reduced to a single value that represents the map unit as a whole. A map unit is typically composed of one or more "components". A component is either some type of soil or some nonsoil entity, e.g., rock outcrop. For the attribute being aggregated, the first step of the aggregation process is to derive one attribute value for each of a map uniYs components. From this set of component attributes, the next step of the aggregation process derives a single value that represents the map unit as a whole. Once a single value for each map unit is derived, a thematic map for soil map units can be rendered. Aggregation must be done because, on any soil map, map units are delineated but components are not. For each of a map uniYs components, a corresponding percent composition is recorded. A percent composition of 60 indicates that the corresponding component typically makes up approximately 60% of the map unit. Percent composition is a critical factor in some, but not all, aggregation methods. The aggregation method "Dominant Condition" first groups like attribute values for the components in a map unit. For each group, percent composition is set to the sum of the percent composition of all components participating in that group. These groups now represent "conditions" rather than components. The attribute value associated with the group with the highest cumulative percent composition is returned. If more than one group shares the highest cumulative percent composition, the corresponding "tie-break" rule determines which value should be returned. The "tie-break" rule indicates whether the lower or higher group value should be returned in the case of a percent composition tie. The result returned by this aggregation method represents the dominant condition throughout the map unit only when no tie has occurred. Component Percent Cutoff.� None Specified Components whose percent composition is below the cutoff value will not be considered. If no cutoff value is specified, all components in the database will be considered. The data for some contrasting soils of minor extent may not be in the database, and therefore are not considered. Tie-break Rule: Higher The tie-break rule indicates which value should be selected from a set of multiple candidate values, or which value should be selected in the event of a percent composition tie. 330 East Myrtle Street USDA Natural Resources Web Soil Survey 1/16/2024 � Conservation Service National Cooperative Soil Survey Page 4 of 4 National Flood Hazard Layer FIRMette ;� ��M� Legend �� . '� • � � � : � � , � j � , i � ♦' ' i ' # ��i 1f �� ' � � � � � � � 1 � r ` S � ` � t . � . i �'1 F=��,;, : I1 s_ • . '� �'`''.�'S'! , . �►� M ' � ' � � v � � _ • •• � I� * ,_ _ �/ 4 � � � ,.- - , �v-- ; � � l�� _ � _ _ �, �� ' , ' ~� _ � � � � � �.`� • • � � - r � �` t �I �4 ��c �. , or-Fo�� e�oll�� AREA OF P�-1ir �I��tAL FLoo�� HALAF;i ()�(1�Q � �� i. i .. r:_ � �.- . ,� ,� � , � � � � ;�� ! � � _�k � � '.�� y �., ' . "r� . t � � � .~ � t . � I 'I�I Ro9V� - 1�: � ,r I . .� w�,� •�� J � � •r !" . � r, �� ,�►• � '• � � � , :��} �' � � , � �. �� i � � � .� ( � i .. �� • � a � � � � _-��i [ � __. � : Feet 1:6,000 0 250 500 1.000 1,500 2,000 � � ' R � � �� 7-'IF= -�1� t ,� . � ��, � . � .. � � � 1 ''!�!��'` ' � i w r � 4 SLE Fi5 HEVOHT fOH pETAILEU LLGEVU ANU TA6EX WiV FON FIHM VANEL UYOUT SPECIAL FLOOD HAZARD AREAS OTNER AREAS OF FLOOD HAZARD W+thout Base Flood Elevation (BFE) .�.�.. , : .r�y With BFE o� De9th %� �+ '•� •10 AH 4Y .au Reguletory FbodwAy 0.2!a Annual Chance Flood Hazard. Aroas of 1% an�ual chance flood wIM avere�e depth bss than one faot or wfth drainage areas of M,s than one square mlle •� �`. Future Condltions 1% Annual Chence F�ood Hezard _; �• � Area wlth Reduced Flood R�k due to Levee. See Notes.: =.," Y Ares �rith FIooO Rhk due to Levee!::�•,.- n NO SCREEN Area of Minimal Flood Hazard ��• , Q Eftective IOMRs OTHER AREAS Area of Undetermined Flood Hazard :> ��• i> GENERAL - — - - �b��, ��t, or Slorm Sewer STRUCTURE5 �� i� i� Levee, pike, or FloodwaN _ �p'� Gou Scrlions with 1% Mnual Chance 17.6 yy�t�r Surtace Elevation ceasta� r�ansea ^^�^^ S'i �-^ Base FIoaA Elevalion Une {BFE) LImR of Study lvrlsdlctlon Boundary -- --- Coas!»I Tranxect Baxelinc OTHER _ _ pratile Baseline FEATURES HydroSraphic Feature Digital Deta Aveilable No Digltal Data Available � MAP PANELS Unmapped 4 The pin dibplayeA oo the map is an approxlmate point selected by the user and does nat re�resent an autho�iWtive property 6ocation. Thls map complles w/th FEMA's standards tw the use of d�gltal flood maps tt rt Ys not vold es descrlbed below. The basemap eAown complle5 wlth fEMA's hasemap accurecy stanAards The flood hazard intormation ia derived dfrectty from the authorrtawe NFHL web services prorided by FEMA. Tltis map was exported on L 18 2U24 at 6 39 PM and docs not reHect cfianges ar amendments subsequent to thls date a�d t�me. The NiHL end eHecrve info�manon may chenge or become wperseded by new data over tlme. � � ` w � � !� This map ima�e es void if the one or more of the fdlowin� map �, elements do not appear. basemap imagery. flood zone labels, , legend. scale bar, map creatlon date. community Identlfiers. _r�;�,� .,._,v �� _=�� r�, FIRM panel number, and FIRM eftective date. Map images fw unmapped and unmodemized areas cannot be used for regulatory purposes. Basemap lmagery Source: USGS Natlonal Map 2023 ar�. � �. _ � ` _ r Fo�tCotlins FCMaps at 330 East Myrtle Street �� T- �,. � LLL. I v .I � � 4 � � , ,� . � � i �'� r �• f i . . ' �r „� . � �� .. �� . ,, .�� L ' i Ilii •I�I �,, -� ,. � . . �� ,� ' A � � � � . t K yw F � � * �' - - '� �`�'�; ' �� =- ��II �. ,� � � �� _ � � _ � �� a �- � i , g �.. � � , � R '` '� - .,� ti� ' �� .-� � -.�,� � � � , = _ ro�ect Site � `�4 � � ' � ��: � � • � � �: ' r`� � . . � 1 �► `� � �� ..��_ - � �� Legend FEMA Floodplain . FEMA High Risk - Floodway FEMA High Risk - 100 Year FEMA Moderate Risk - 100 / 500 Y� City Floodplains ■ City High Risk - Floodway City High Risk - 100 Year City Moderate Risk - 100 Year �. j City Limits �i �.� � Notes 286.0 0 143.00 286.0 Feet This map is a user generated static output from the City of Fort Collins FCMaps Internet mapping site and is for reference only. Data layers that appear on this WGS 1984 Web_Mercator_Auxiliary_Sphere map may or may not be accurate, current, or otherwise reliable. City of Fort Collins - GIS `�, , � � . f �1 � ' � � � ` � � � .; � � ; t � � � � EX/STING l/ERTICAL CURB allo currER ABBREVIATION LEGEND: AC ACRES DS DOWNSPOUT DWG DRAWING EG EXISTING GROUND FF FINISHED FLOOR FG FINISHED GRADE FL FLOWLINE FS FINISHED SURFACE (CONCRETE) GB GRADE BREAK GFF GARAGE FINISHED FLOOR HP HIGH POINT LP LOW POINT ROW RIGHT-OF-WAY LEGEND: �> , �. o� � � � � � � � � r�'� EXISTING CONCRETE PROPOSED FLOWLINE DRAINAGE BASIN LIMITS CONCENTRATED DRAINAGE FLOW DIRECTION OVERLAND DRAINAGE FLOW DIRECTION DRAINAGE BASIN ID DRAINAGE BASIN AREA (ACRES) �� — / � / / � � � � • / / ,I � � � � � � � � � � � J� � � � � � � � Developed Overall Site Hardscape or Historic Site Site Area Hard Surface Area (sf) (sf) Concrete (100%) 330 290 Rooftop (100%) 2,865 3,240 Total Impervious Area 3,195 3,530 Adjusted Site Imperviousness 335 Area Draining to Alley 0 750 New Area Draining to Alley 750 � � Vil�� Y �/2 Lt`� I �, ��f�� 'i��, �\ II �� CITY OF FORT COLLINS �� I I � ��7 .° II �--� I D -,-, �� I � � I� � �� I I � I � ,�l U � � �� -� � � � � � �-�--� , I � � I �_�^_________�______ ___�___ EXISTING RESIDENCE � _ � .� - - - � �� . - , — - -� - � , L. i 7 � I, � — , � . — � ��, � � � i � � ��, � ,� � � � ; P .> �.„ � � 1. _ �� _ .� -. 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I � �q , , � , � ` � � a . , , , a , � , � � , �` , , . �� 9 ., ;� , �, a , � � __, � n � , , - � , < <� - � ;,� �� %� �" � �� c � � ��` i �, � ;�' � U � � � a � J _ � ,�'- _' __ �; � ^, � � _ _ — L:� '— l — — — —_ \� _ — —, . __ — _— _ — , /\ h/ _ i I _ -,�,_�-�-� �!-� ■ ■ f■ ; - �f ■ ■-�-� #��- ■ � - ■ � � — - ; : . — , - -�- — - - — - -- I ` I -- -: - _ I — � p P _ --- — - �_- _- II � � ,� p�� - --- II �:... I � � —p—a_� -- ��, ,� . I I � '--,� � - --_ � , ,. .-�� ---- �, ,, _ � _ - II � � ��. o � �.I'' �, I � ,_� � � � I I �, � � � a � ,- I I I � - -� _ �_ o � � w I I I j � _-I �7 � � j� � � � � � j p (� ��`� 5'x3o' PROPosE� I I �i�, I ,---_,� L � O ( � �''�'•, � I �� / � L� � � � � �V � f\ � �n�"' CONCREfE APRON � i� II j � �� 7 —I � � � 0.196 �� F�� .�� —��1--a, -- � ------ � � �:� I� � — �� I AC ; � Cn � � � � � �:� ' n 4, I � N � a �! I �� . , L I� � 4 � , .'� � � . � _, ;� � I L�, 1 , � . ,Ll.,a y4 II � � � . , � � � � p PROPOSED � � �:� I I � ' � � �� ' � � --- � I ° � _� � � � �I � - ' ,� _ � � o � ss--- J_ ��--- _�— -- � GARAGE II � ��. � �.:� _ - � � , � �� -- ------ �-- °� � S� ss-- SS— � , , ` a � o ------� � — — � r S _� S�_ ss— ss- II � _ c J. � _ � -- N i � i ��;� � � � `' � � � � C O o � � - -- . -- - � ��__T_�. � , � > �� (� � � B � �- ��-�, � � 0 �-�' � � � � � � � .° —= —I 0.022 I I � ° � � � AC � � � � � ��-. � ' � I � � p. , � � ' � � � � , � , � � � �� - 7 . . 9 � � �. 9 � �� , o �� w� �g�eg� ��.�� a�,�o (�� —. I , , o , , , L � =-�-� I �� 'x�"�' � _ _ � �� , �� - I� � � � _ � � _ - x -, x � � ' �� fl � I RETAINING WALL REQUIRED TO I a ' _ � ; Q , Q' I � � I PREVENT STORMWATER FROM EXISTING RESIDENCE DRAINING ONTO PRIVATE I p '� � I T T EXISTING RESIDENC�� I I EXISTING RESIDENCE I PROPERTY TO THE EAST I' �, ' I v J C I � EXISTING RESIDENCE I � � ' ' ', � � � � �� O A � �� EXISTING GARAGE I � , a' , L U� '" ',J O 0 C' �' � FF=4990.24 I fl � � � �� I ' „ � ' -� � � Z .a A, � � � � , U � �. « � � �7 0 , , ��. � I I I I I�� ao �� ,� �,�� I I I I� _ �� _ � �__ �� i � � DEVELOPED DRAINAGE BASINS FOR DRAINAGE REVIEW ONLY NOT FOR CONSTRUCTION �o . "' �.. a , Q' l Aa �, - � � '�� \ p_� �� -- `_, �,_ � � ,; � �, ;F� �_� ;_� �J J I� � � � "� �s;�� , �f � _ )? ��= ��;. �� Know what's b@IOW. Call aefore you dig. � m 0 0 i � N O N 0 z m 0 � ,� � -- � N O N o CO z 0 oQ 0 ��o�� D 0 LICF�s .,......... O �� N �. ��,�F`� . �, . . i � 39378 m's . . . . �- �o� ... ..�\�� FSS�ONA� E� W � � J 1`� / � � W C'� C'7 SHEET � � � _ � W W � Q Z � � � � 1 OF 1 U � zw� � �� O U �O J > � U j U Yzow U � � w , LL�°�Y W��.N�U W v��w 3.. M L.L � � �� ,� �� l �,---J � � � � � i \�� \ � � ' � ,'I � � � �� . '�, __ y � / �\ i �� ' �,� %��,�� . � � Q � O J � U � Z J J � U � � � � II � � � � � �� -� �� i � .�: I � I� __ � � � EXISTING RESIDENTIAL LOT D I' �— — — � — I � � I� � � � I � �, � ,- � � �` � ,� � � , ,�� I � � � �_ 190.10' �r — _ � �°-�; � — �-%� ��so°oo�i2 w — ,� ,: - - -, - -- ;�;-- � < � � — — — — =—a�, . �� _ — F� -rr: � � � �- ---- FO � � - � -- II ��-: � I I PROPERTY LINE ��. � �� E—�- -� _ �`' �--� � �� ` �� I_ I � � _,_ � ° � m ��— \ . � � i �1 II �, �. M -��o� � �I � � r.� � I I I , L tn N — — ^� — � ' � � � —I � �,. C � � T — � W�� . � l(pf� _, ' c.� . , , � � � Z a ° �_ G L. i � d" c.L-._ — �`, �� —�"�� `. � _ � . . o � I � � � e�� ,, S�_ � �I � � � — — � � O � --� — ��— _�-- ��_ ss-- �� — , PROPOSED �, W� � I I�'� ;, � �� GARAGE J T� I I' i -- I� ,- � �� ,� . o. � - 1 �I �' � � I ` — — — — — — — — — — �i ll'�, ' o � NO°02'28"E � — — �. , l.� _- —�� _ � � Q e, . �. - -- > _ � � w � ,. � � 190.05' X Y �- ,� 4 , � � L a � , � h ° ` ' I EXISTING � � n ,�� z O , p,� �� I I m � GARAGE I � � o ' „`�` "' ° ' O O(-� � C � " ' ', � EXISTING RESIDENTIAL LOT � � FF=4990.24 i a O'.. �� Q'' � w�� Q p i� � I I I N I � � � � o � u � �� I o N -�a in �,, ep, G (� ;. 'I I __ � � '� � a _� c� � �. I I� _ � —I `° y ` — II� j � � � �� ,�, �, � ._ LEGEND: C� a �♦ , , . , o' • , � a , � ; a '.� ' P ' . � < -- X X �X CONCENTRATED DRAINAGE FLOW DIRECTION OVERLAND DRAINAGE FLOW DIRECTION EXISTING/PROPOSED CONCRETE AS NOTED PROPOSED FLOWLINE PROPOSED RETAINING WALL EXISTING FENCE Fo Fo Fo — EX COMCAST FIBER OPTIC o�.0 OVERHEAD UTILITY LINE E SS SS SS UNDERGROUND POWER LINE EX SEWER SERVICE � I � �� \ � �99� I �� 5� �`1\ � � S ETBAC K - � / �, �O _ _ F� , o �,� � � �.�' � � � � f [ � � � � � �� r W J J Q � W i Q a � � � i � -° o � C `"-pz �� P � =7 ��i N C�; C� � ' � I � � ' � \ \ I � / I' �/ � � � — — —��u� �� ,_. � � � � �� - - - � � � � � �� , �� — �� , � � _;' PETERSON STREET I \ , SEE DETAILED SITE � GRADING PLAN SHEET 2 � � � � � / — / '� _ � � ( � I� � � POUDRE FIRE AUTHORITY STATION 1 � ', � � �� O � \ i r � / � � � � N �� if�`J �o�,p,D 0 L �CF�s ��.....�� \_ C�� PN �' %r '• FO — : C� F� : :�� O1/16/24 mt - � 39378 : � �`� �I9itallY si9netl bY • Magan L Kee�e � � Reason: I alle ^I' o IM1� � � tlocuno a9� � C °a'Aszozao,'�� `�Ss�oNa� E�� U � z w � g �� o U �O J > F U j U Yzow W U � � W LL��Y W No�� Y �LL�� . �. ■ - �. , � �1 1� �1 ,� _� � � Z W Q W � a a (� (:3 °C W Z O 'J � U � � z G � J � J U W � O M> LL M � SHEET 1 OF 2 LEGEND: � �g�� . X(�gg� 9) X 2� � (1�) � a ., o . . , • a , � , a , � P , D� PROPOSED SPOT ELEVATION EXISTING SPOT ELEVATION PROPOSED SLOPE EXISTING SLOPE EXISTING/PROPOSED CONCRETE AS NOTED PROPOSED FLOWLINE PROPOSED RETAINING WALL PROPOSED DOWNSPOUT AND FLOW DIRECTION ABBREVIATION LEGEND: CONC CONCRETE DS DOWNSPOUT DWG DRAWING EG EXISTING GROUND EOG EDGE OF GRAVEL EX EXISTING FF FINISHED FLOOR FG FINISHED GRADE FL FLOWLINE FS FINISHED SURFACE (CONCRETE) GB GRADE BREAK GFF GARAGE FINISHED FLOOR HP HIGH POINT LP LOW POINT ROW RIGHT-OF-WAY —FO— -oH�� E — —ss— EX COMCAST FIBER OPTIC OVERHEAD UTILITY LINE UNDERGROUND POWER LINE EX SEWER SERVICE FENCE LINE Developed Overall Site Hardscape or Historic Site Site Area Hard Surface Area (s� (sfl Concrete (100%) 330 290 Rooftop (100%) 2,865 3,240 Total Impervious Area 3,195 3,530 Adjusted Site Imperviousness 335 Area Draining to Alley 0 750 New Area Draining to Alley 750 CITY BENCHMARK: 29-97 NORTHEAST CORNER OF MULBERRY ST. AND WHEDBEE ST., ON A CONCRETE TRAFFIC SIGNAL BASE. NAVD88 ELEVATION = 4978.01 SITE BENCHMARK: NORTHEAST PROPERTY CORNER FOR LOT 10. NAVD88 ELEVATION = 4889.15 SURVEY NOTES: 1. THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE APPROXIMATE WHEN SHOWN ON THESE DRAWINGS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY THE EXISTENCE OF ALL UNDERGROUND UTILITIES IN THE AREA OF THE WORK BEFORE COMMENCING NEW CONSTRUCTION. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL UNDERGROUND UTILITIES AND SHALL BE RESPONSIBLE FOR ALL UNKNOWN UNDERGROUND UTILITIES. 2. ALL PROJECT CONTROL LISTED HEREON IS PROVIDED AS A COURTESY. IT IS THE RESPONSIBILITY OF THE RECIPIENT TO VERIFY THE ACCURACY OF THE COORDINATES AND ELEVATIONS SHOWN PRIOR TO USING THEM FOR ANY PURPOSES. 3. ANY LOT LINES, RIGHTS OF WAY OR EASEMENTS SHOWN ARE APPROXIMATE AND ARE NOT TO BE RELIED UPON FOR FUTURE IMPROVEMENTS. GRADING NOTES: 1. TOP OF FOUNDATION MUST BE AT LEAST 6" ABOVE THE HIGHEST GRADE SURROUNDING ALL BUILDINGS. 2. THERE MUST BE A MINIMUM GRADE OF 5� AWAY FROM THE BUILDINGS WITHIN THE FIRST 5 TO 10 FEET ADJACENT TO THE FOUNDATION. 3. SLOPES MUST NOT TO BE STEEPER THAN 33% (3:1). 0 � � , - �a / � � \ � -�--- �g9� �� - � ,�a-,� - � a. _ �° ' � Qy 4 I _' �. _ .. _ � � 14' � ; _ � ��,,� ��g8g �� o ;\/,; I ' � 7� ; i: <, � i ._ � II I �u 5i I C�9a9 i I , �I _ ii �� O fV � I T T I rn o '' w r o � � i � � ��g$g,2) � i ;� � I'iv � / � � 0 J J Q � z w 0 � W � c� z � � x w � I,I _ � PROPERTY LINE PAVED ALLEY , I � EXISTING CONCRETE TO BE REMOVED � �� , 30' CONC DRIVEWAY� i i� i - — '_ - - - � 50.08' — — o— � � � •a , ' J ,. , � � � • , .�, a � ' „D�S�. "' � y � 'f� 4' f"� � I � ' � — J I 4 a � _ •�� —� �, a _ 1 FO �,_ RELOCATE EXISTING UTILITIES AS NECESSARY WITH CONSTRUCTION I PROPOSED GARAGE TOF=4991.20 4990.7 FG 4990— �9a9 6� c 4990.7 � FG i I � ;�; � i.�� W Z �I!; �-Oy� i ~ I I I � W ��, \� � � ,' a I o �, ��; , � j �. � ''; I I I 10 0' 5 10 20 1 " = 10' �0 4989.6 �FI (4989. 6) _� � >J d a a a� � ' � ,¢ , J Q c' � O p� Ul W =- W � �' i � � � 0 � Z�� Q�w�� Z � � � ��m�� 6' ' � o � wwwW� ��z= 14% . � v.-.�~z cn = Z w o��=� �.. Z=w�� g� o - N O W a 'llo. �'v� o � 3' 17% 4990. U � Zw� � �� o U �O J > F U j U YZOLL U � � W LL��Y W No�� Y �LL�� -. �. ■ ' 'r � � '� 1� � / 4990.5� / \' � I FG J �\ V � � z Q z * (4989.6) _� � o ! w I � EXISTING � � m � ? W RESIDENTIAL o�� N�o LOT UU� O� O � W w� Z m ozZ_ �`' � Z `��o `�~ � W �� s a � � J I �` a 0 c� w � O'ZQ JW r � �oc�n Q — — (%� Z � v � J ¢ Q(4989.4� I J Q U � * I x � � Z � J I I EXISTING � Q J I RESID�ETTIAL � W U � " i. 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